Step 1 Press the Windows Logo Key



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Date27.01.2017
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How to Disable SIP ALG on TP-Link ADSL modem router

Suitable for: TD-8816, TD-8817, TD-8840T, TD-8841T, TD-W8101G, TD-W8901G

For the VOIP application, sometimes the ISP will ask you to disable SIP ALG on your modem router. Please refer to the following steps to do the configuration.



Step 1 Press the Windows Logo Keyhttp://uk.tp-link.com/resources/images/faq/2011689264387.jpg +"R" Key on the Keyboard at the same time or click on Start button->Run to open Run program.

 

Step 2 Type in cmd in the open bar and click OK.



http://uk.tp-link.com/resources/images/faq/20116892639248.png

NOTE: In Windows 7,you can also just type cmd in the search bar and

press Enter instead of above two steps .



http://uk.tp-link.com/resources/images/faq/20116892743545.jpg

 

Step 3 Type in "telnet 192.168.1.1" (192.168.1.1 is the default IP Address of the modem router, if you have changed it, please type in the matched IP) and press Enter.



http://uk.tp-link.com/resources/images/faq/20116892917525.jpg

NOTE:In Win7 or Vista, the telnet command may not be enabled by default, please click on Start button->Control Panel->Programs-> Programs And Features->Turn Windows features on or off,then Check Telnet Client and hit OK to enable telnet command.

 

Step 4 In the telnet page, type in the password for the modem router (default is admin) and press Enter.



 

Step 5 Type in command ip nat service sip sw off.If SIP ALG is disabled successfully, it will show Nat Sip v2 switch off!

http://uk.tp-link.com/resources/images/faq/20116893120690.jpg

NOTE：

All of the above settings are temporary. Once you restart or reset the modem, the SIP ALG will be turned back on.

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